Update business logic and storage for 2014

Sync the backend code with the 2014 application questions. This brings
the application in to line with the application form as described at
https://meta.wikimedia.org/w/index.php?title=Wikimania/Scholarships/Application&oldid=6724072

Change-Id: If592765ecd8e4202511698ae024ee29e82ebf2d2